A great new initiative was launched recently: Move the Web Forward, which encourages developers to get involved in standards development. So I though it opportune to update and expand upon a how to by Ian Hickson from 2007.
Blog posts in the Standards category
If you have a number of related images (or other content) with caption text, you can use nested figure elements to associate both a group caption and an individual caption to each instance using the figcaption element.
This is a comment I made on the article Pursuing Semantic Value The author requested that I post it separately, so I have.